westinghouse



(No Model.)

J. WBSTINGHOUSE.

SPARK ARRESTER.

Patented sept. 29, 1885.

. WEITOR.

UNITED STATES PATENT OFFICE.

JOHN WESTINGHOUSE, OF SCHENEOTADY, NEW YORK.

SPARK-ARRESTER.

SPECIFICATION forming part of Letters Patent No. 327,366, datedSeptember 29, 1885.`

Application filed May 28, 1885. (No model.)

.To @ZZ whom t may concern:

Beit known that I, JOHN WEsTINGHoUsE residing at Schenectady, in thecounty of Schenectady and State of New York, a citizen of the UnitedStates, have invented or discovered certain new and useful Improvementsin Spark-Arresters, of which improvements the following is aspecification.

In the accompanying drawings, which make part of this specification,Figure lis a side view, in elevation, of the forward portion of alocomotive-boiler illustrating the application of my invention; and Fig.2, avertical section through the same at the line x of Fig. 1.

My present invention relates to improvements in spark-arresters of thetype illustrated in Letters Patent of the United States No. 298,807,granted and issued to me under date of May20, 1884, and its object is tofacilitate the arrest and retention of such of the lighter and smallersparks and cinders as may pass from the deflecting-casing into the stackand tend to escape therefrom.

To this end my invention, generally stated, consists in the combinationof a locomotiveboiler smoke-box and a spark-receptacle surrounding thesmoke-box and communicating at top with the stack and at bottom with adischarge-pipe; also, in the combination,with the smoke-box ofalocomotive-boiler, of a discharge-fine opening into the base of thestack, a defiecting-cone and casing located above said iiue, and aspark-receiving chamber surrounding the smoke-box and communicating attop with the stackbase. The improvements claimed are hereinafter fullyset forth.

In the practice of my invention I provide a short discharge-line, 2,which is secured to the top of the smoke-box 1 of a locomotiveboiler, 4,in or about in line with the center of the exhaust-pipes 3, said fluebeing of sufficient diameter to afford free escape for the gaseousproducts of combustion delivered from the tubes 5. A deflecting-cone, 6,formed of a conical plate of metal having an outwardly and downwardlycurved rim, is, as in my Letters Patent N o. 298,807, above referred to,connected to the discharge-flue adjacent to its exit end, the apex ofthe cone being located within and concentric with the flue, so as toform an annular discharge-opening, 7, around the same, and a casing, 8,which is open at both ends and in the form of a frustum of a cone, isconnected at its smaller end to the rim of the deecting-cone 7. Acylindrical base, 9, of such diameter as to afford an annulardischarge-passage of proper area around the casing 8, incloses thedischarge-flue, cone, and casing, and a plain open stack, 10, is securedto the upper end of the base 9.

The stack-base, which is open at bottom, is secured upon a segmentalcasing, 11, surrounding the top and sides of the smoke-box 1, andextending downwardly on the same for such distance as may be sufficientto properly clear the steam-chests 12, said casing forming anindependent spark chamber or receptacle, 13, between its inner surfaceand the smokebox, which chamber communicates at its top with thestack-base, and receives and retains such light sparks and cinders asmay pass out of the discharge-fine 2, and are downwardly deliected bythe cone 6 and casing 8. The casing 11 is extended entirely around thesmoke-box in front of the cylinders, so as to form at that point adischarge chamber, 14, into which the sparks and cinders which lodge inthe smoke-box may be dropped through a port or nozzle, 15, provided witha door or valve, 16, and the solid matter which accumulates in thechamber 14 may be dumped therefrom at desired intervals through a bottomdischarge-pipe, 17, governed by a valve, 18.

In operation the heavier particles of unconsumcd fuel will be depositedin the forward portion of the smoke-box, which may be extended for aproper distance, governed by the character of the fuel employed and thedegree of perfection of combustion attained in the fire-box, to providesufficient space for their reception,and can thence be dischargedthrough the port 15 and pipe 17 from time to time, as required; Thelighter particles which may pass out of the discharge-flue 2 aredeflected into the independent chamber 13, which provides ample spacefor retaining them without liability to being lifted by the exhaustuntil. such time as it may be convenient to remove them through thedischarge-pipe 17.

I claim herein as my invention- 1. The combination,withalocomotive-boiler smoke-box, of a spark-receptacle formed IOC betweenthe smoke-box and an external casing, forming an independentspark-chamber, which communicates at its top with the stack-base7 and isprovided with a bottom discharge-pipe located adjacent to the front ofthe smokeboX, substantially as set forth.

2. The combination of a iocomotive-boiler smokebox provided with avalved dischargeport adjacent to its forward end, a easing surroundingsaid smoke-box and forming an independent spark chamber communicatingwith the stack-base, and a bottom dischargepipe leading out of saidchamber adjacent to the smoke-box discharge-port and governed by a dooror valve, substantially as set forth.

3. The combination of a 1ocom0tive-boi1er smoke-box, a discharge-flueleading out of the top of the smoke-box and opening into the stack-base,a delecting-cone and casing 1ocated above said ue, and a spark-receivingchamber surrounding the smoke-box and communicating with the stack-base,substantially as set forth.

In testimony whereof I have hereunto set lny hand.

JOHN VVESTINGHOUSE.

Witnesses:

JOHN CANTINE, HENRY Y. BRADT.

